<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>Document</title>
</head>
<body>
  <div id="app"><div id="name"></div></div>

  <script>
    let obj = {}
    Object.defineProperty(obj, 'name', {
      get: function() {
        return document.querySelector('#name').innerHTML
      },
      set: function(val) {
        document.querySelector('#name').innerHTML = val
      }
    })
    obj.name='adela'
  </script>
</body>
</html>